A model is a preferable choice, of course, and it is unfortunate for those of us who have little or no experience in creating/modifying models to rely on them so much.

Your best bet is to ask one of our local modellers to commission one for you. It doesn't seem like an overly complex model to create, but then i have no idea what it takes to make one. Personally i agree with you, this would be an excellent model to have.